refactor(types): centralize type definitions in shared types file

Move all interface and type definitions to src/types/index.ts to reduce code duplication and improve maintainability. This includes types for components, blog posts, personal info, and localization.

src/components/SkillsMarquee.tsx

@@ -1,14 +1,7 @@
 import { motion, useAnimation } from "framer-motion";
 import { useState, useEffect } from "react";
 import { useTranslations } from "@/i18n/utils";
-
-/**
- * Skill item interface for the marquee component
- */
-interface SkillItem {
-  name: string;
-  icon: string; // skillicons icon name
-}
+import { type SkillItem } from "@/types";
 
 /**
  * All skills data with corresponding skillicons names